Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
var accessors = require( './accessors.js' );
// MAIN //
/**
* Returns the first index of a specified search element in a strided array using alternative indexing semantics.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {*} searchElement - search element
* @param {Collection} x - input array
* @param {integer} strideX - stride length
* @param {NonNegativeInteger} offsetX - starting index
* @returns {integer} index
*
* @example
* var x = [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, 3.0 ];
*
* var idx = gindexOf( x.length, 3.0, x, 1, 0 );
* // returns 2
*/
function gindexOf( N, searchElement, x, strideX, offsetX ) {
var ix;
var o;
var i;
if ( N <= 0 ) {
return -1;
}
o = arraylike2object( x );
if ( o.accessorProtocol ) {
return accessors( N, searchElement, o, strideX, offsetX );
}
ix = offsetX;
for ( i = 0; i < N; i++ ) {
if ( x[ ix ] === searchElement ) {
return i;
}
ix += strideX;
}
return -1;
}
// EXPORTS //
module.exports = gindexOf;
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